Pw.println(lineNumber + ': ' + stringRead) īlock, and code after it which means you are not writing anything to your result file and you don't even close it. For example, like this: try(PrintWriter out = new PrintWriter(new FileOutputStream('outputfile.txt', true))) To tell it which mode you want, you will need to create FileOutputStream with correct mode. Since you did not specify what mode to use, your writer will use the default. The FileOutputStream has two general write models: How to use the same printwriter in multiple classes (java)Ĭonstructor you are using to create a PrintWriter uses new instance of FileOutputStream internally. PrintWriter printWriter = new PrintWriter(file)

You should try creating a path for the folder it contains before: File file = new File('C:/Users/Me/Desktop/directory/file.txt') If you read the documentation of PrintWriter constructor you can seeįileNotFoundException - If the given string does not denote an existing, writable regular file and a new regular file of that name cannot be created, or if some other error occurs while opening or creating the file Java won't create it by itself since the File class is just a link to an entity that can also not exist at all.Īs you stated the error is that the file cannot be created. If the directory doesn't exist you need to create it. How to use PrintWriter and File classes in Java?

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